What is special about tissue present in | Class 11 Biology Chapter Structural Organisation in Animals, Structural Organisation in Animals NCERT Solutions

Define a taxon. Give some examples of taxa at different hierarchical levels.

What are the steps involved in formation of a root nodule?

The essential functions of roots are anchorage and absorption of water and minerals in the terrestrial plant. What functions are associated with
the roots of aquatic plants. How are roots of aquatic plants and terrestrial plants different?

How are polysaccharides and disaccharides digested?

While eating peach or pear it is usually seen that some stone like structures get entangled in the teeth, what are these stone like structures called?
 

Carefully observe the following figure

a. Name the technique shown in the figure and the scientist who demonstrated this technique for the first time.
b. Name atleast three plants for which this technique can be employed for their commercial production.
c. What is the significance of aerating tube and feeding funnel in this setup?

Write brief note on the following
a. Synaptonemal complex
b. Metaphase plate
 

Match the following
a. Amphibia                   i. Air bladder
b. Mammals                  ii. Cartilaginous notochord
c. Chondrichthyes         iii. Mammary glands
d. Ostichthyes               iv. Pneumatic bones
e. Cyclostomata            v. Dual habitat
f. Aves                          vi. Sucking and circular mouth without jaws.